應該還有更好的辦法，以下只為實現功能

/* * 完整替換字串，如：2dashu_16/2dashu_1)*100，只替換：2dashu_1，不會替換：2dashu_16 * str:字串 * old:要替換單詞 * newWord:替換後單詞 */ public static String completeReplace(String str,String old,String newWord){ Pattern p = Pattern.compile(old + "([^_//d//w])"); Matcher m2 = p.matcher(str); StringBuffer sb = new StringBuffer(); while (m2.find()) { m2.appendReplacement(sb, newWord+m2.group(1)); } m2.appendTail(sb); return sb.toString(); }